Conventional myosins - unconventional functions

Biophysics Reviews
Peter D ChantlerImelda M McGonnell

Abstract

While the discovery of unconventional myosins raised expectations that their actions were responsible for most aspects of actin-based cell motility, few anticipated the wide range of cellular functions that would remain the purview of conventional two-headed myosins. The three nonsarcomeric, cellular myosins-M2A, M2B and M2C-participate in diverse roles including, but not limited to: neuronal dynamics, axon guidance and synaptic transmission; endothelial cell migration; cell adhesion, polarity, fusion and cytokinesis; vesicle trafficking and viral egress. These three conventional myosins each take on specific, differing functional roles during development and maturity, characteristic of each cell lineage; exact roles depend on the developmental stage of the cell, cellular location, upstream regulatory controls, relative isoform expression, orientation and associated state of the actin cytoscaffolds in which these myosins operate. Here, we discuss the separate yet related roles that characterise the actions of M2A, M2B and M2C in various cell types and show that these conventional myosins are responsible for functions as unconventional as any performed by unconventional myosins.

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Citations

Jul 31, 2020·Molecular Biology of the Cell·Vivian W Tang
Jul 17, 2020·Cancer Reports·Madison Furnish, M Cecilia Caino
Oct 8, 2020·Molecular Biology of the Cell·Colbie R ChinowskyMatthew J Tyska
Feb 20, 2021·The Journal of General Physiology·Lu WangChun Y Seow

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